Actually, you do not need to brine a kosher bird because it has already been brined in the packaging. Since kosher packaging essentially packs the bird in a heavy salt water solution, it has already been brined.

This is such a good question. I grew up in a kosher home and have used kosher meat and fowl on and off for years. I do think the kosher turkeys stay moist, but I always wonder if it's my imagination. The process for koshering is, to my best understanding, a much shorter process than brining, but I don't know if that makes any significant difference. for koshering, I think the turkey would only be sitting in the salt for a half hour or an hour, and then rinsed repeatedly.

I think Allie may be on to something here. I would not brine a kosher bird in a traditional (salt) brine as it would become too salty. However, you could make a brine with crushed garlic and plenty of fresh and dried herbs and spices. (some like sugar in their brine; I think it makes it taste like icky deli slices.) Submerge the turkey and refrigerate--an hour per pound is a good guide. I would use small amount of salt--just a tablespoon or two--to keep the salt from moving from the bird into the water and un-seasoning it. Don't forget to drain the turkey, put it on a rack in a roasting pan, and refrigerate for about 12 hours before roasting to let the skin dry out for nice crispy, brown skin.

Allie - maybe a dry brine with just a little salt and the herbs, etc.? The turkey will have already been soaked as well as salted and rinsed. Was the one in the times dry?

My mother, in the days before we all talked about brining, always wrapped the turkey in cheesecloth and bathed it with stock and orange juice with onions cooking in the pan so that their juices also hit the bird via basting. I think she took the cheesecloth off toward the end so the skin could brown.

OK, figured it out. For kashering purposes, meat is soaked for 30 min (not in salted water) and then "dry brined" for about an hour, so yes, additional soaking (in barely salty water, with other spices) will work. Thanks for all the ideas.

Since brining is meant to cause cellular changes via osmosis that enable the meat to retain moisture, I don't know if the dry salting technique used in Koshering will produce the same results. However, I have heard that gently brining a Kosher turkey (half the salt and half the time), can produce good results. The type of salt one uses is also critical. I only use Diamond Crystal. I have not had good results with Morton Kosher.

Dry salting rather than brining is popular with Cooks Illustrated these days, just rubbing the salt under the skin of the bird with herbs and spices and then allowing it to sit in the fridge for a while. I can't really remember specifics, but I've read about it a few times in the last year or so. Maybe an herb paste with just a little salt applied under the skin before cooking would work and you'd be able to monitor the amount of salt used more easily.